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1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········?
1 2 9 10 25 26 ··· 4 3 8 11 24 27 ··· 5 6 7 12 23 26··· 17 1816 15 14 13 22 29···1 2 9 10 25 26 ··· 4 3 8 11 24 27 ··· 5 6 7 12 23 26···16 15 14 13 22 29·· ·17 18 19 20 21 30···36 35 34 33 32 31··· ·
1+2+3-4+5+6+7-8+9+10+11-12+···+25+26+27-28=?
1+2+3+4+5+6+7+8+9+1+11+12+13+14+15````````1+2+3+4+5+6+7+8+9+1+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28++29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50··································
带有数字的四字词语按顺序1···2···3···4···5···6···7···8···9···10···祝福语
这几道奥数题谁会,求2014在哪一行那一列 1 2 3 4 5 10 9 8 7 6 11 12 13 14 15 20 19 18 17 16 求2014哪一行那一列 1 2 3 4 5 6 7 8 9 ···· ····· ··························
同步课时特训数学七上1.1 12题把数字如图排列中间一排:1、5、13、25····则中间第十个数是几?12 36 5 4 7 8 9 1015 14 13 12 1116 17 18 19 20 2128 27 26 25 24 23 22··························
三角形数和正方形数的规律比如(三):1,3,6,10,15,21,……正:1,4,9,16,25··············
计算1/(1*4)+1/(4*7)+1/(7*10)+------+1/(97*100)································································································
带数字1·2·3·4·5·6·7·8·9·10·的成语,每个数字至少三个
正整数按图的规律排列,请写出第二十行,第二十一列的数 列 行 1 2 5 10 17 4 3 61118 9 8 7 12 19 急列 1 2 3 4 5行 1 2 5 10 17······················ 4 3 6 11 18······················9
把自然数从1开始,排列成下表:1 2 4 7 11 16······ 3 5 8 12 17······ 6 9 13 18·····把自然数从1开始,排列成下表:1 2 4 7 11 16······3 5 8 12 17······6 9 13 18······10 14 19······15 20··
找规律 1,4,9,16,25,36······a,( )
1*2*3*4*5*6*7*8*9*10·········*50积的末尾一共有多少个0?
有十副牌1·2·3·4·5·6·7·8·9·10每次拿五副有多少种拿法
1+2-3-4+5+6-7-8+9+10······+1990怎么简算急
1-2+3-4+5-6+7-8+9-10+······+199简便计算
18·76×9·9+18·76 0·25×16·2×0·4 4·8×9·9 7·09×10·8 -0.8×7.09 4.8×100.1 4.2 ÷3.5 32